洞窟システム
Poço Azul
Single reference figure (pool 40 m long, 20 m wide, 60 m deep); fossils were recovered from up to 16.5 m. A survey by Rubbioli (1998, O Carste 10(1)) exists but was not opened.
A flooded cave inside a collapse sinkhole by the Paraguaçu River in Nova Redenção, Chapada Diamantina. Cave divers recovered a rich Ice Age mammal fauna here in 2005, including a near-complete giant ground sloth; today visitors swim and snorkel.
Poço Azul, also recorded as Poço Azul do Milú, is a flooded cave in the municipality of Nova Redenção, on the banks of the Paraguaçu River in the Chapada Diamantina of central Bahia. Like many caves in the region it opens inside an asymmetric collapse sinkhole, about 50 m across, which cuts the water table some 30 m below the surface.
Fossil bones were discovered underwater in the cave in 1995. In 2005 a team specialising in cave diving recovered the material from depths of up to 16.5 m. The collection, curated by the palaeontology collection of the Museu de Ciências Naturais PUC Minas in Belo Horizonte, covers more than ten mammal species, living and extinct, including two ground-sloth species new to science and an articulated, almost complete skeleton of the giant ground sloth Eremotherium laurillardi.
Researchers describing the preparation of the sloth skeleton noted that because the bones fossilised underwater they preserve fine anatomical detail that is usually lost in specimens from dry cave deposits.
Today the pool is a popular swimming and snorkelling stop, with visitors issued life jackets and masks; a beam of sunlight reaches the water around midday for much of the year. None of the sources reviewed describe recreational scuba diving being offered, so diving access is listed as unknown.
地質学
The cave lies in the carbonate karst of the Chapada Diamantina. It opens within an asymmetric collapse doline about 50 m in diameter that intersects the water table about 30 m below, a pattern typical of the region; its steep entrance probably acted as a natural trap for animals.
なぜ重要か
Poço Azul is one of Brazil's most important underwater fossil sites. Material recovered by cave divers in 2005 includes more than ten mammal species, two previously unknown ground sloths and a near-complete Eremotherium laurillardi skeleton, unusually well preserved because it fossilised underwater.
コンディション
A sunbeam reaches the water around midday, roughly February to October according to tourism references; the timing differs between sources. Visitors are asked not to wear sunscreen, moisturiser or repellent and to shower before entering. No temperature or visibility figures from a primary source were found.
公表資料からの一般的な範囲であり、現在のコンディションではありません。
測量と探査の歴史
| 1995 | Submerged fossil bones were discovered in the cave. [1] [2] |
| 1998 | Ezio Rubbioli published a topographic map of the cave in an article on cave diving in the Bahia backlands (O Carste 10(1)). [1] |
| 2005 | A specialised cave-diving team recovered the fossils from depths of up to 16.5 m. [1] [2] |
| 2016 | A paper in Terrae Didatica described the laboratory preparation of the Eremotherium laurillardi skeleton. [1] |
入口とダイブサイト
One entrance through the sinkhole, reached by a wooden staircase and platform used by visitors.
方向確認用であり、ナビゲーション用ではありません。白抜きのドットはおおよその位置を示しています。
このページのすべての情報とその出典 (12)
| 情報 | ステータス | 出典 |
|---|---|---|
| The cave lies within an asymmetric collapse doline about 50 m in diameter that intersects the water table about 30 m below.The paper cites Rubbioli (1998). | 確認済み | [1] |
| The cave is on the banks of the Paraguaçu River in the municipality of Nova Redenção, Chapada Diamantina, Bahia. | 確認済み | [1] |
| The fossils were discovered in 1995 and recovered in 2005 by a team specialised in cave diving from a maximum depth of 16.5 m.Showcaves (s2) gives about 15 m and names diver Túlio Schargel as the 1995 discoverer. | 確認済み | [1] |
| The collection includes more than ten mammal species, two new ground-sloth species and an articulated, almost complete Eremotherium laurillardi skeleton, curated at the Museu de Ciências Naturais PUC Minas. | 確認済み | [1] |
| Because fossilisation happened underwater, the material preserves morphological detail not seen in other E. laurillardi fossils from dry settings. | 確認済み | [1] |
| The cave map used in the 2016 paper is modified from Rubbioli (1998), and the authors credit Ezio Rubbioli of the Grupo Bambuí de Pesquisas Espeleológicas for material on the cave. | 確認済み | [1] |
| A show-cave reference gives the pool as 40 m long, 20 m wide and 60 m deep.Single tourism reference; primary survey not opened. | 報告済み | [2] |
| Swimming is allowed; snorkel, mask and life jacket are supplied at check-in; visitors should shower first and avoid sunscreen and creams.Showcaves page (fees on it are 2020 data). | 報告済み | [2] |
| A Bahia tourism guide describes Poço Azul as a floating (snorkelling) experience.Published 2013, updated 2025-07-02. | 報告済み | [3] |
| The visitors' meeting point at Restaurante Dona Alice, Povoado Piruca, is at about 12.782 S, 41.149 W.Area-level coordinate of the public check-in point, not of the cave. | 報告済み | [2] |
| The best light on the water is given as 8 February to 20 October, around midday; the stated hours differ within the source. | 報告済み | [2] |
| Because the entrance is vertical and hard to reach, the animals preserved in the cave probably fell in by accident.Interpretation by the paper authors. | 確認済み | [1] |
確認済み：直接開いた公式または一次情報源による記載。報告ベース：二次情報源のみによるもの。情報が競合：注釈に両方のバージョンを記載。最新情報でない可能性あり：確認できた最新の情報源が古い。
上記のソースをもとに、独自の言葉でまとめています。 修正を報告する